/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package mobileAPI;

import entity.Courserates;
import entity.Enrollment;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Date;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import jpa.controllers.CourseratesJpaController;
import jpa.controllers.EnrollmentJpaController;
import jpa.controllers.exceptions.IllegalOrphanException;
import jpa.controllers.exceptions.PreexistingEntityException;

/**
 *
 * @author Geymen
 */
public class RateCourseServlet extends HttpServlet {

    /**
     * Processes requests for both HTTP
     * <code>GET</code> and
     * <code>POST</code> methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        
        Integer userID;
        userID = Integer.valueOf(request.getParameter("userID"));
        
        Integer courseID;
        courseID = Integer.valueOf(request.getParameter("courseID"));
        
        Integer rating;
        rating = Integer.valueOf(request.getParameter("rating"));
        
        EnrollmentJpaController enrollentJPAController = new EnrollmentJpaController();
        Enrollment enrollment = enrollentJPAController.findEnrollment(userID, courseID);
        
        boolean success = false;
        
        if (enrollment != null) {
            Courserates courseRates = new Courserates();
            courseRates.setId(enrollment.getId());
            courseRates.setPoints(rating);
            courseRates.setSysdate(new Date());
            courseRates.setEnrollment(enrollment);
            
            CourseratesJpaController courseratesJPAController = new CourseratesJpaController();
            try {
                courseratesJPAController.create(courseRates);
                success = true;
            } catch (IllegalOrphanException ex) {
                success = false;
                Logger.getLogger(RateCourseServlet.class.getName()).log(Level.SEVERE, null, ex);
            } catch (PreexistingEntityException ex) {
                success = false;
                Logger.getLogger(RateCourseServlet.class.getName()).log(Level.SEVERE, null, ex);
            } catch (Exception ex) {
                success = false;
                Logger.getLogger(RateCourseServlet.class.getName()).log(Level.SEVERE, null, ex);
            }
        }        
        
        try {
            /* TODO output your page here. You may use following sample code. */
//            out.println("<!DOCTYPE html>");
//            out.println("<html>");
//            out.println("<head>");
//            out.println("<title>Servlet RateCourseServlet</title>");            
//            out.println("</head>");
//            out.println("<body>");
//            out.println("<h1>Servlet RateCourseServlet at " + request.getContextPath() + "</h1>");
//            out.println("</body>");
//            out.println("</html>");
            
            if (success) {
                out.println("1");
            } else {
                out.println("-1");
            }
                    
        } finally {            
            out.close();
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP
     * <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP
     * <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
